Hydraulics and Fluid Mechanics Mcqs

This set of Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ Hydraulics and Fluid Mechanics ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Civil Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Railway Engineering Hydraulics and Fluid Mechanics comprehensively.

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1.
Viscosity of water in comparison to mercury is ______________________?

Higher

Lower

Same

Higher/lower depending on temperature

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2.
The bulk modulus of elasticity __________________?

Has the dimensions of 1/pressure

Increases with pressure

Is large when fluid is more compressible

Is independent of pressure and viscosity

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3.
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to _________________?

1000

2100

2700

10,000

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4.
Surface tension _____________________?

Acts in the plane of the interface normal to any line in the surface

Is also known as capillarity

Is a function of the curvature of the interface

Decreases with fall in temperature

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5.
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is _________________?

400 kg/cm2

4000 kg/cm2

40 x 105 kg/cm2

40 x 106 kg/cm2

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6.
Units of surface tension are_________________?

Energy/unit area

Distance

Both of the above

It has no units

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7.
Choose the correct relationship_________________?

Specific gravity = gravity x density

Dynamicviscosity = kinematicviscosity x density

Gravity = specific gravity x density

Kinematicviscosity = dynamicviscosity x density

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8.
For manometer, a better liquid combination is one having______________?

Higher surface tension

Lower surface tension

Surface tension is no criterion

High density and viscosity

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9.
Alcohol is used in manometer, because______?
Choose the wrong statement:

its vapour pressure is low

it provides suitable meniscus for the inclined tube

it provides accurate readings.

its density is less

it provides longer length for a given pressure difference

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10.
The property of fluid by virtue of which it offers resistance to shear is called____________________?

Surface tension

Adhesion

Cohesion

Viscosity

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11.
The density of water is 1000 kg/m3 at __________________?

0°C

0°K

4°C D. 20°C

All temperature

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12.
The ratio of absolute viscosity to mass density is known as____________________?

Specific viscosity

Viscosity index

Kinematic viscosity

Coefficient of viscosity

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13.
Which of the following is the unit of kinematic viscosity _________________?

Pascal

Poise

Stoke

Faraday

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14.
Alcohol is used in manometers because_____________________?

It has low vapour pressure

It is clearly visible

It has low surface tension

It can provide longer column due to low density

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15.
Specific weight of sea water is more that of pure water because it contains ________________?

Dissolved air

Dissolved salt

Suspended matter

All of the above

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